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Dr Ashley J Ruiter

@astronomash.bsky.social
546 followers 183 following 54 posts

🇦🇺🇨🇦 research on binary stars, their evolution and lead up to type Ia supernova explosions 🌟 into occasional weightlifting, LGBTQIA2S+ Ally 🏳️‍🌈🏳️⚧ she/her

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Dr Ashley J Ruiter @astronomash.bsky.social · 26/08/2025
Apparently it's #internationaldogday 🐶 Our little floofer is 9 months tomorrow 💗
Jimmy the cavoodle puppy lying in his bed looking at camera with puppy dog eyes rest-biting his favourite bunny toy.
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Astronomy Australia Limited (AAL) @astroaustralia.bsky.social · 10/07/2025
Fantastic to see the 2026-2035 Astronomy Decadal Plan launched at the Annual Science Meeting. What better way to celebrate than cake! We look forward to continuing to support the Australian astronomy community to implement this inspiring plan. Read the plan here: t.co/HUGz9Vgn86
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Dr Ashley J Ruiter @astronomash.bsky.social · 02/07/2025
Thanks for helping to put this together ESO PR team! Very excited to see the paper finally out in @natastron.nature.com 🧪🔭
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NSF–DOE Rubin Observatory @rubinobservatory.org · 23/06/2025
Introducing...your sneak peek at the cosmos captured by NSF–DOE Vera C. Rubin Observatory! Can you guess these regions of sky? This is just a small peek...join us at 11am US EDT for your full First Look at how Rubin will #CaptureTheCosmos! 🔭🧪 #RubinFirstLook ls.st/rubin-first-look-livestream
A sprawling, textured field of galaxies scattered across the deep black of space. It is filled with the delicate smudges and glowing cores of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. The image focuses on a collection of interacting galaxies connected by delicate streams of stars. At top center lies a large elliptical galaxy that is dense and smooth, like a polished stone glowing with golden light. Like delicate spider silk or stretched taffy, these stellar bridges link the large elliptical to the few larger galaxies beneath, evidence of past collisions.

All throughout the image, thousands of galaxies gather in clusters or are spread throughout, like glittering gems strewn on a table. Some are sharp-edged and spiral, like coiled ribbons; others round and diffuse, like polished pebbles. Still others are just smudges of various colors against the black of space. The background is peppered with pinpoint stars in reds, yellows, and blues, crisp against the velvet black. A cosmic tapestry of glowing tan and pink gas clouds with dark dust lanes. In the upper right, the Trifid Nebula resembles a small flower in space. Its soft, pinkish gas petals are surrounded by blue gas, and streaked with dark, finger-like veins of dust that divide it into three parts. It radiates a gentle, misty glow, diffuse and soft like the warmth of breath on a cold hand. To the lower left, the much larger Lagoon Nebula stretches wide like a churning sea of magenta gas, with bright blue, knotted clumps sprinkled throughout where new stars are born. Both nebulae are embedded in a soft tan backdrop of gas that is brighter on the left than on the right, etched with dark tendrils of dust and sprinkled with the pinpricks of millions of stars.A sprawling, textured field of galaxies scattered across the deep black of space. It is filled with the delicate smudges and glowing cores of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. To the lower left is a region filled with the hundreds of golden glittering gems of a distant galaxy cluster. In the foreground, below and right of center, two blue spiral galaxies look like eyes beneath the entangled mass of a triple galaxy merger in the upper right. A few bright blue points of foreground stars pierce the glittering tapestry.

All throughout the image, thousands of galaxies gather in clusters or are spread throughout, like glittering gems strewn on a table. Some are sharp-edged and spiral, like coiled ribbons; others round and diffuse, like polished pebbles. Still others are just smudges of various colors against the black of space. The background is peppered with pinpoint stars in reds, yellows, and blues, crisp against the velvet black.
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European Space Agency @esa.int · 11/06/2025
🌞 See the Sun from a whole new angle. For the first time, our Solar Orbiter mission has captured close-up images of the Sun’s mysterious poles, regions long hidden from our view.
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Robert "The Bobby Yaga" McNees @mcnees.bsky.social · 07/06/2025
If you teach physics, Prince can help your students learn the Right Hand Rule. 🎢
A black and white photo of Prince, next to a column on text in a magazine spread. His right hand is outstretched, with his thumb and fingers pointing out three orthogonal directions, they have been labeled F, v, and B as a mnemonic for determining the direction of magnetic force on a moving positive charge.
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 15/05/2025
Yo, #Sydney and #Melbourne! Some exciting news! Over last few months have been planning an excellent #SciComm event for our cities. We're hosting @astrokatie.com here in Oz for two weeks to talk about 'The End of Everything!' and more fun science. Got a fantastic program planned for you! 1/3 🔭
Portrait photo of Katie Mack. She is smiling and looking towards the right of the image.
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Sarah Hörst @planetdr.bsky.social · 04/06/2025
For those of us who made the poor choice to have our life’s work governed by orbital mechanics, 4 years can change a project from “some really interesting science to do towards the end of my career”into “won’t happen in my lifetime” (Looking at you Uranus orbiter)
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Phil PlAIt @philplait.bsky.social · 01/06/2025
Pretty big coronal mass ejection from the Sun hit us last night. The results are beautiful.
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Dr Ashley J Ruiter @astronomash.bsky.social · 24/05/2025
Harvard launches short online FREE course on understanding US government and democracy (and more) pll.harvard.edu/course/we-pe...
pll.harvard.edu
We the People: Civic Engagement in a Constitutional Democracy | Harvard University
Gain a foundational knowledge of American constitutional democracy while crafting your own civic voice and identity.
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US National Gemini Office @usngo.bsky.social · 20/05/2025
This week’s image is of type Ia supernovae! Optical and NIR spectra taken with Gemini's GMOS and Flamingos-2 helped assess the goodness of various models that constrain the explosion, progenitor star, and binary companion. Check out the 🧵 for more papers on supernovae! #astronomy 📷 credit in thread
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Dr Jan Eldridge @astro-jje.bsky.social · 12/05/2025
So the Department of Physics at the University of Auckland is looking to hire a lecturer/senior lecturer in one of the following areas: - Physics education research, - Quantum optics and quantum information, - Biophotonics and/or medical physics, - Astrophysics and/or space technology. 1/2...
jobs.smartrecruiters.com
Lecturer/Senior Lecturer in Physics
Company Description: Waipapa Taumata Rau | The University of AucklandKo te whare Pūtaiao | The Faculty of Science at the University of Auckland is the leading science faculty in New Zealand and one of...
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NSF–DOE Rubin Observatory @rubinobservatory.org · 13/05/2025
Rubin #CommissioningNotes ✍️: The data deluge from NSF–DOE Rubin Observatory is coming! Rubin captured over 500 exposures per night across 3 nights this week, using its automated observation scheduler — that’s 20x more than during the 7 week period with the engineering camera last year!🔭 🧪 🧵
View of Rubin Observatory's massive telescope structure inside the observatory dome. The telescope is a teal steel structure shaped like a squat vase with a round bottom. To the left, a large white donut-shaped screen is mounted on the dome wall, about two-thirds the size of the telescope structure. Just above the telescope, the vertical dome slit is slightly open, showing a blue-purple night sky outside. The interior of the dome is silver metal above and black light-blocking screen s on the sides, all criss-crossed by teal support beams.
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Roman Telescope 🔴 Gallery @roman-telescope.bsky.social · 05/05/2025
NASA Science: Roman Space Telescope article (Aug 8, 2024) NASA's future missions will rely on citizen scientists to help discover new exoplanets beyond our solar system. science.nasa.gov/open-science/exoplanet-future-citizen-science/
K2-33b, shown in this illustration, is one of the youngest exoplanets detected to date using NASA's Kepler Space Telescope. Credit: NASA/JPL-Caltech
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Benjamin Pope @benjaminpope.bsky.social · 17/04/2025
This is great, but it's also a little depressing that it's unfunded and fishing for philanthropic support.
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Jonathan McDowell @planet4589.bsky.social · 06/04/2025
An obit for Alicia Soderberg, a lovely person who will be much missed. I met Alicia when she was an undergrad student in my summer REU research progam; she later became a valued teacher in the same program, mentoring many students who themselves went on to success.
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ESO @eso.org · 07/04/2025
What's the magical green glow that dominates the sky in this pic of ESO’s La Silla Observatory? 🧐 Known as airglow, it's a faint light emitted by the Earth’s atmosphere and it is only visible in the darkest of places. What causes it? Find out here: www.eso.org/public/image... 🔭 🧪 📷 J. Pérez/ESO
A fisheye lens view of the night sky taken from the ground of an astronomical observatory. Several telescope domes and other buildings are arranged around the circular frame. The sky glows in green hues and it is filled with stars. The band of the Milky Way galaxy is visible in the middle.
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 26/03/2025
Finally! We can start to talk about the absolute carnage that is magnetic field orientation of Neptune. What even is this absolute chaos?! How?!?! Why is Neptune like this???!!! (I love Neptune, probably equal first with Jove) 📸 Aplin et al. 2020 Space Science Reviews
Diagram showing Neptune and its very offset magnetic field. The North Pole stars where the equation and rotation axis meet. South Pole is pointed near the south edge of the planet. The magnetic axis does not align with rotation axis and is offset by 47°. Field lines are also drawn
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Aaron Rupar @atrupar.com · 25/03/2025
Duckworth: "Hegseth is the most unqualified sec def in history & this is further demonstrating his incompetence. He's literally leaking classified war plans via group chat...if you're our allies, I'd be thinking twice about sharing classified information...All these people need to lose their jobs"
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ARC Tracker @arc-tracker.bsky.social · 25/03/2025
Meanwhile, in Europe👇
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Brett Morris @brettmorr.is · 19/03/2025
The atomic spectral lines in this app come from the NIST atomic spectroscopy group, which has provided the world with spectroscopic measurements for 120 years. Today we got word that the federal government is laying off the entire group. 🔭🧪
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Physics Today @physicstoday.aip.org · 10/03/2025
Vera Rubin has been selected to be featured on the back of a quarter. She is the first astronomer to be honored this way. Read about her research on the Andromeda galaxy and how it led to the discovery of dark matter in this article written by Rubin herself. doi.org/10.1063/1.24... 🔭 #WomenInStem
A black and white photo of Vera Rubin measuring spectra
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Ted Stryk @tedstryk.bsky.social · 01/03/2025
Today in 1982, Venera 13 landed on Venus, taking the first color photos of the surface of Venus. These are my reprocessed versions of the full panoramas.
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Benjamin Pope @benjaminpope.bsky.social · 26/02/2025
Loved this historical paper on comparing Henrietta Swan Leavitt's Cepheid period-luminosity data & law to the most modern measurements of the same stars & same law - and remarkably, for century old data, it stacks up pretty well!
arxiv.org
The Legacy of Henrietta Leavitt: A Re-analysis of the First Cepheid Period-Luminosity Relation
Henrietta Swan Leavitt's discovery of the relationship between the period and luminosity (hereafter the Leavitt Law) of 25 variable stars in the Small Magellanic Cloud, published in 1912, revolutioniz...
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Dr Ashley J Ruiter @astronomash.bsky.social · 17/02/2025
Our baby No.4 💕 He has 4 white socks 🧦🧦 and sharp baby teeth!
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Physghoul 👻 🎃 @physgal.bsky.social · 13/02/2025
🧪⚛️
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William Gibson @greatdismal.bsky.social · 02/02/2025
So are Vancouver bartenders whipping up a maple syrup and tequila cocktail?
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 14/01/2025
Astro folks - do this survey if you get a chance, please! Keen to see the results since we've had a couple of large migrations over here in the last few months. 🔭🧪📡🪐
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Emily Hunt @emily.space · 12/01/2025
The @esa.int Gaia satellite will take its final scientific measurements on Wednesday. 🔭 This will conclude a 12 year series of continuous observations. Larger Gaia data releases are still in progress, but Gaia has already had a HUGE impact on our understanding of the #milkyway. (Image: ESA)
An artist's impression of the Gaia spacecraft.
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Konkoly Observatory @konkolyobs.bsky.social · 02/01/2025
Glorious aurora and SAR arc on the first night of 2025, as captured by our all-sky camera at Piszkéstető station: www.youtube.com/shorts/X3aOj...
youtube.com
2025 New Year's Aurora from Piszkéstető
YouTube video by László Molnár
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Jason Spyromilio Ιάσων Σπυρομίλιος @apolitosb.bsky.social · 27/12/2024
🔭 a good year so far. Telescope going up, mirrors being delivered … Christian’s Supernova paper on H0 submitted arxiv.org/abs/2411.04968 Spent months talking & thinking why most in the Astro community don’t teach forbidden lines correctly. Finally decided to write it up. arxiv.org/abs/2410.22539
arxiv.org
Forbidden lines are not quenched
There is no such thing as quenching of forbidden lines.
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 27/12/2024
A cool celestial firework (a supernova!) went off in NGC 3621, - a galaxy ~22 million light-years away - in April of this year, and lots of folks from around the world turned their telescopes to catch it. It was very bright, even through small apertures. I tracked it for months! #Highlights2024
Two tile image features two vertical tiles. The first on the left is a wide angle shot of a spiral galaxy. It is small and resides within a dense star field. On the right is the zoomed in version, looking closer at Galaxy. An annotated arrow points to a white star which is the supernova.Five vertical narrow tiles, each showing a zoomed in section of an astrophotograph of a spiral galaxy’s edge. There is an arrow annotated to one of the bright stars in the galaxy which is the supernova on each of these images.
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 21/12/2024
Wi-Fi (provides benefits to billions of people) ... came from radio astronomers looking for tiny black holes PCR tests (helped billions during the pandemic) ... came from studying extremophile bacterium in hot springs and now this 👇👇👇 You never know what science research will give our future!
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Astronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social · 21/12/2024
Happy #WinterSolstice! The days in the north will get longer from here on in 🥳
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Dr Ashley J Ruiter @astronomash.bsky.social · 18/12/2024
Last day working at #HITS #Heidelberg Taking the 30 "short bus" for maybe the last time
Towards-the-sky sky shot showing HITS bus stop (Haltestelle) sign with clouds in background with HITS purple flag and main gate plus some trees.
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Ele Willoughby @minouette.bsky.social · 11/12/2024
Day 11 #ArtAdventCalendar: Happy birthday to trailblazing US #astronomer Annie Jump Cannon (1863 – 1941), here with her stellar classification system which sorted stars based on spectral types, revealing their temperature from hot blue to cool red stars: O,B,A, F, G, K & M. 🧪🐡👩🏼‍🔬🔭 #histsci 🧵
My linocut of Annie Jump Cannon shows her in a 3/4 profile view wearing a shirt with a lace collar and her hair up. She is printed in a gradient of violet at the bottom to green at the top, printed on white 11” x 14” paper. The background is printed in a gradient (left to right) of dark blue, light blue, yellow, pale yellow, pale orange, orange and red. The background block excludes her silhouette of shoulder and head with the exception of a smattering of small dots in a swath from upper left to lower right (which extends to white spots on the coloured background). Also along the bottom are a series of circles of decreasing size (left to right, blue through red) labelled O, B, A, F, G, K, M. There’s a axis line along the bottom with 6 tick marks. Vertically from top to bottom along the left side are 15-, 10-, 5-, 0, 5, 20, 15.
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Howie Hua @howiehua.bsky.social · 06/12/2024
Look at the tan lines I got on the beach #math #ITeachMath #EduSky
A selfie of me at the beach. My left arm has a sketch of the graph of y=tan(x).
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 03/12/2024
MOAR EVIDENCE FOR THE GRAVITATIONAL WAVE BACKGROUND! Using MeerKAT (super sensitive telescope array) the MPTA team have also found supporting evidence (with their assumptions and models) of the GWB that other PTAs announced last year. This is further independent verification! The Universe rattles!
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Bluesky @bsky.app · 03/12/2024
Scientists, academics, researchers: We’re excited to share that @altmetric.com is now tracking mentions of your research on Bluesky! 🧪
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Dr Ashley J Ruiter @astronomash.bsky.social · 03/12/2024
Thanks @apolitosb.bsky.social! Our review on Type Ia supernovae 🌟 was a few years in the making, glad it's finally going to be published! 🔭🧪
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Dr Laura Driessen @astrolaura.com · 30/11/2024
Looking to add some science from amazing scicomm-ers to your feed? The Superstars of STEM starter pack by @florahui.bsky.social: go.bsky.app/FGXUnLS And a couple of astro/physics starter packs by @sevenrasmussen.com: go.bsky.app/NvQERru go.bsky.app/4Kr3B48
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Bryan Gaensler @scibry.bsky.social · 01/12/2024
Important advice: how to avoid gender bias when writing recommendation letters.
See https://csw.arizona.edu/sites/default/files/avoiding_gender_bias_in_letter_of_reference_writing.pdf for PDF version.
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Physghoul 👻 🎃 @physgal.bsky.social · 24/11/2024
👩🏻‍🔬 ⚛️ Looking for astronomers
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Tara Murphy @taramurphy.bsky.social · 24/11/2024
#Physics #art 4 - Today's piece from our Sydney Physics art collection is by Peter Tuthill (@spiralstar.bsky.social) and @astrojoe.bsky.social. Apep and the Spiral Binary Star Orbit, taken with ESO's Very Large Telescope shows the elegant dust plume surrounding the star system Apep. #Astronomy
The star Apep and its binary orbit. There are two images next to each other on a black background. The colour scheme is red to yellow. The left image shows an image from the ESO VLT telescope. The right image shows a computer simulation of the system. Credit: Peter Tuthill.
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 22/11/2024
Nuts! 👀 🤯 Using ESO's VLT as an interferometer, astronomers took an image of a dying star. Now, it's not the first time we've done this ... but .... .... this star is in a neighbouring galaxy! (the Large Magellanic Cloud - 160,000 ly) www.aanda.org/articles/aa/... 📸 ESO/K. Ohnaka et al. 🔭
blurry image of a central, oval shape that is the star and it is surrounded by an elliptical ring, a feature that is not yet well understood.
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Yvette Cendes @whereisyvette.bsky.social · 20/11/2024
Just landed after flying overnight from Portland PDX to Amsterdam, and guess what we saw out the window over Baffin Island!!! Northern lights so bright it cast shadows in the plane wing, shimmering and shifting in seconds. One of the best displays I’ve ever seen! 🤩 🔭🧪
Northern lights with reflection in plane wingNorthern lights and Orion This need sitting on the floor to watch the show Baby sleeping while the northern lights dance above her
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Tara Murphy @taramurphy.bsky.social · 18/11/2024
OzGrav (our ARC Centre of Excellence for Gravitational Wave Discovery) has arrived on Bluesky! @ozgrav.bsky.social ozgrav.org
Artists impression of a black hole and neutron star merging. Image credit Carl Knox at OzGrav / Swinburne.
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 18/11/2024
Fun pre-print time! 🚨 PSR J0337+1715 is a bit of a unique system, it's got a pulsar and 2 white dwarfs orbiting it (triple). Excellent GR lab. This paper analyses an extended dataset and proposes models to explain low-frequency timing noise, incl. modelling the possibility of a pulsar planet! 🔭📡
arxiv.org
Explanation of the exceptionally strong timing noise of PSR J0337+1715 by a circum-ternary planet and consequences for gravity tests
Context: Timing of pulsar PSR J0337+1715 provides a unique opportunity to test the strong equivalence principle (SEP) with a strongly self-gravitating object. This is due to its unique situation in a ...
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Jen Cross @jencross.bsky.social · 12/11/2024
Remember the eclipse back in April? Since eclipses are rare I practiced camera settings and timing... then changed travel plans, watched the weather like a hawk, and ended up driving quite a bit. It all worked out. I'm proudest of this image and would love to do projects like this more often.
A scene with inky darkness. The moon blots out the sun and ring of fire appears in the sky. The horizon looks like sunset and the golden color reflects in the lake. Three people in the bottom right corner look up. They are in silhouette.
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Max-Planck-Institut für Astronomie @mpi-astro.bsky.social · 11/11/2024
Tomorrow's edition of the Heidelberg Joint Astronomical Colloquium features Elena Pancino tracing peculiarities of multiple stellar populations in globular clusters - hybrid in the Großer Hörsaal at Philosophenweg 12 and online via Zoom 🔭 physik.uni-heidelberg.de/hephysto/ind...
Announcement of the talk "StarDance: the non-canonical evolution of stars in clusters" by Elena Pancino on 12 November 2024 at 16:30 CEST at Philosophenweg 12 and online via Zoom, with an artists Impression of a binary star system with mass transfer
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